openlayers

<!doctype html> <html lang="en"> <head> <title>Code coverage report for ol/source/rastersource.js</title> <meta charset="utf-8" /> <link rel="stylesheet" href="../../prettify.css" /> <link rel="stylesheet" href="../../base.css" /> <meta name="viewport" content="width=device-width, initial-scale=1"> <style type='text/css'> .coverage-summary .sorter { background-image: url(../../sort-arrow-sprite.png); } </style> </head> <body> <div class='wrapper'> <div class='pad1'> <h1> <a href="../../index.html">all files</a> / <a href="index.html">ol/source/</a> rastersource.js </h1> <div class='clearfix'> <div class='fl pad1y space-right2'> 47.31% Statements 79/167 </div> <div class='fl pad1y space-right2'> 16.67% Branches 7/42 </div> <div class='fl pad1y space-right2'> 47.06% Functions 8/17 </div> <div class='fl pad1y space-right2'> 47.31% Lines 79/167 </div> </div> </div> <div class='status-line low'></div> <pre><table class="coverage"> <tr><td class="line-count quiet">1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533</td><td class="line-coverage quiet">1× 1× 1×   1× 1× 1× 1× 1× 1× 1× 1× 1× 1× 1× 1× 1× 1× 1× 1× 1× 1× 1×                             1×           2×           2×             2×           2×   2× 4×               2×           2×       2× 2× 2× 4×               2×             2×           2×                                                 2×   2× 1×       1×                   1× 1×             1×                       1×                                                                 1×                       1×                                                                                           1×                                         1×                                                                   1×                                                             1×                                                                                     1×                 1× 2× 4×                     1× 2× 2× 2× 4×   2×                   1× 4× 4× 1× 3× 3×       4×                   1× 3× 3×                   1× 1× 1×                 1×                               1×                                                   1×           1×                              </td><td class="text"><pre class="prettyprint lang-js">goog.provide('ol.source.Raster'); goog.provide('ol.source.RasterEvent'); goog.provide('ol.source.RasterEventType');   goog.require('goog.asserts'); goog.require('goog.events'); goog.require('goog.events.Event'); goog.require('goog.events.EventType'); goog.require('goog.object'); goog.require('goog.vec.Mat4'); goog.require('ol.ImageCanvas'); goog.require('ol.TileQueue'); goog.require('ol.dom'); goog.require('ol.ext.pixelworks'); goog.require('ol.extent'); goog.require('ol.layer.Image'); goog.require('ol.layer.Tile'); goog.require('ol.raster.OperationType'); goog.require('ol.renderer.canvas.ImageLayer'); goog.require('ol.renderer.canvas.TileLayer'); goog.require('ol.source.Image'); goog.require('ol.source.State'); goog.require('ol.source.Tile');       /** * @classdesc * A source that transforms data from any number of input sources using an array * of {@link ol.raster.Operation} functions to transform input pixel values into * output pixel values. * * @constructor * @extends {ol.source.Image} * @param {olx.source.RasterOptions} options Options. * @api */ ol.source.Raster = function(options) {   /** * @private * @type {*} */ this.worker_ = null;   /** * @private * @type {ol.raster.OperationType} */ this.operationType_ = options.operationType !== undefined ? options.operationType : ol.raster.OperationType.PIXEL;   /** * @private * @type {number} */ this.threads_ = options.threads !== undefined ? options.threads : 1;   /** * @private * @type {Array.<ol.renderer.canvas.Layer>} */ this.renderers_ = ol.source.Raster.createRenderers_(options.sources);   for (var r = 0, rr = this.renderers_.length; r < rr; ++r) { goog.events.listen(this.renderers_[r], goog.events.EventType.CHANGE, this.changed, false, this); }   /** * @private * @type {CanvasRenderingContext2D} */ this.canvasContext_ = ol.dom.createCanvasContext2D();   /** * @private * @type {ol.TileQueue} */ this.tileQueue_ = new ol.TileQueue( function() { return 1; }, goog.bind(this.changed, this));   var layerStatesArray = ol.source.Raster.getLayerStatesArray_(this.renderers_); var layerStates = {}; for (var i = 0, ii = layerStatesArray.length; i < ii; ++i) { layerStates[goog.getUid(layerStatesArray[i].layer)] = layerStatesArray[i]; }   /** * The most recently rendered state. * @type {?ol.source.Raster.RenderedState} * @private */ this.renderedState_ = null;   /** * The most recently rendered image canvas. * @type {ol.ImageCanvas} * @private */ this.renderedImageCanvas_ = null;   /** * @private * @type {olx.FrameState} */ this.frameState_ = { animate: false, attributions: {}, coordinateToPixelMatrix: goog.vec.Mat4.createNumber(), extent: null, focus: null, index: 0, layerStates: layerStates, layerStatesArray: layerStatesArray, logos: {}, pixelRatio: 1, pixelToCoordinateMatrix: goog.vec.Mat4.createNumber(), postRenderFunctions: [], size: [0, 0], skippedFeatureUids: {}, tileQueue: this.tileQueue_, time: Date.now(), usedTiles: {}, viewState: /** @type {olx.ViewState} */ ({ rotation: 0 }), viewHints: [], wantedTiles: {} };   goog.base(this, {});   if (options.operation !== undefined) { this.setOperation(options.operation, options.lib); }   }; goog.inherits(ol.source.Raster, ol.source.Image);     /** * Set the operation. * @param {ol.raster.Operation} operation New operation. * @param {Object=} opt_lib Functions that will be available to operations run * in a worker. * @api */ ol.source.Raster.prototype.setOperation = function(operation, opt_lib) { this.worker_ = new ol.ext.pixelworks.Processor({ operation: operation, imageOps: this.operationType_ === ol.raster.OperationType.IMAGE, queue: 1, lib: opt_lib, threads: this.threads_ }); this.changed(); };     /** * Update the stored frame state. * @param {ol.Extent} extent The view extent (in map units). * @param {number} resolution The view resolution. * @param {ol.proj.Projection} projection The view projection. * @return {olx.FrameState} The updated frame state. * @private */ ol.source.Raster.prototype.updateFrameState_ = function(extent, resolution, projection) {   var frameState = /** @type {olx.FrameState} */ ( goog.object.clone(this.frameState_));   frameState.viewState = /** @type {olx.ViewState} */ ( goog.object.clone(frameState.viewState));   var center = ol.extent.getCenter(extent); var width = Math.round(ol.extent.getWidth(extent) / resolution); var height = Math.round(ol.extent.getHeight(extent) / resolution);   frameState.extent = extent; frameState.focus = ol.extent.getCenter(extent); frameState.size[0] = width; frameState.size[1] = height;   var viewState = frameState.viewState; viewState.center = center; viewState.projection = projection; viewState.resolution = resolution; return frameState; };     /** * Determine if the most recently rendered image canvas is dirty. * @param {ol.Extent} extent The requested extent. * @param {number} resolution The requested resolution. * @return {boolean} The image is dirty. * @private */ ol.source.Raster.prototype.isDirty_ = function(extent, resolution) { var state = this.renderedState_; return !state || this.getRevision() !== state.revision || resolution !== state.resolution || !ol.extent.equals(extent, state.extent); };     /** * @inheritDoc */ ol.source.Raster.prototype.getImage = function(extent, resolution, pixelRatio, projection) {   if (!this.allSourcesReady_()) { return null; }   if (!this.isDirty_(extent, resolution)) { return this.renderedImageCanvas_; }   var context = this.canvasContext_; var canvas = context.canvas;   var width = Math.round(ol.extent.getWidth(extent) / resolution); var height = Math.round(ol.extent.getHeight(extent) / resolution);   if (width !== canvas.width || height !== canvas.height) { canvas.width = width; canvas.height = height; }   var frameState = this.updateFrameState_(extent, resolution, projection);   var imageCanvas = new ol.ImageCanvas( extent, resolution, 1, this.getAttributions(), canvas, this.composeFrame_.bind(this, frameState));   this.renderedImageCanvas_ = imageCanvas;   this.renderedState_ = { extent: extent, resolution: resolution, revision: this.getRevision() };   return imageCanvas; };     /** * Determine if all sources are ready. * @return {boolean} All sources are ready. * @private */ ol.source.Raster.prototype.allSourcesReady_ = function() { var ready = true; var source; for (var i = 0, ii = this.renderers_.length; i < ii; ++i) { source = this.renderers_[i].getLayer().getSource(); if (source.getState() !== ol.source.State.READY) { ready = false; break; } } return ready; };     /** * Compose the frame. This renders data from all sources, runs pixel-wise * operations, and renders the result to the stored canvas context. * @param {olx.FrameState} frameState The frame state. * @param {function(Error)} callback Called when composition is complete. * @private */ ol.source.Raster.prototype.composeFrame_ = function(frameState, callback) { var len = this.renderers_.length; var imageDatas = new Array(len); for (var i = 0; i < len; ++i) { var imageData = ol.source.Raster.getImageData_( this.renderers_[i], frameState, frameState.layerStatesArray[i]); if (imageData) { imageDatas[i] = imageData; } else { // image not yet ready return; } }   var data = {}; this.dispatchEvent(new ol.source.RasterEvent( ol.source.RasterEventType.BEFOREOPERATIONS, frameState, data));   this.worker_.process(imageDatas, data, this.onWorkerComplete_.bind(this, frameState, callback));   frameState.tileQueue.loadMoreTiles(16, 16); };     /** * Called when pixel processing is complete. * @param {olx.FrameState} frameState The frame state. * @param {function(Error)} callback Called when rendering is complete. * @param {Error} err Any error during processing. * @param {ImageData} output The output image data. * @param {Object} data The user data. * @private */ ol.source.Raster.prototype.onWorkerComplete_ = function(frameState, callback, err, output, data) { if (err) { callback(err); return; } if (!output) { // job aborted return; }   this.dispatchEvent(new ol.source.RasterEvent( ol.source.RasterEventType.AFTEROPERATIONS, frameState, data));   var resolution = frameState.viewState.resolution / frameState.pixelRatio; if (!this.isDirty_(frameState.extent, resolution)) { this.canvasContext_.putImageData(output, 0, 0); }   callback(null); };     /** * Get image data from a renderer. * @param {ol.renderer.canvas.Layer} renderer Layer renderer. * @param {olx.FrameState} frameState The frame state. * @param {ol.layer.LayerState} layerState The layer state. * @return {ImageData} The image data. * @private */ ol.source.Raster.getImageData_ = function(renderer, frameState, layerState) { renderer.prepareFrame(frameState, layerState); // We should be able to call renderer.composeFrame(), but this is inefficient // for tiled sources (we've already rendered to an intermediate canvas in the // prepareFrame call and we don't need to render again to the output canvas). // TODO: make all canvas renderers render to a single canvas var image = renderer.getImage(); if (!image) { return null; } var imageTransform = renderer.getImageTransform(); var dx = Math.round(goog.vec.Mat4.getElement(imageTransform, 0, 3)); var dy = Math.round(goog.vec.Mat4.getElement(imageTransform, 1, 3)); var width = frameState.size[0]; var height = frameState.size[1]; if (image instanceof Image) { if (!ol.source.Raster.context_) { ol.source.Raster.context_ = ol.dom.createCanvasContext2D(width, height); } else { var canvas = ol.source.Raster.context_.canvas; if (canvas.width !== width || canvas.height !== height) { ol.source.Raster.context_ = ol.dom.createCanvasContext2D(width, height); } else { ol.source.Raster.context_.clearRect(0, 0, width, height); } } var dw = Math.round( image.width * goog.vec.Mat4.getElement(imageTransform, 0, 0)); var dh = Math.round( image.height * goog.vec.Mat4.getElement(imageTransform, 1, 1)); ol.source.Raster.context_.drawImage(image, dx, dy, dw, dh); return ol.source.Raster.context_.getImageData(0, 0, width, height); } else { return image.getContext('2d').getImageData(-dx, -dy, width, height); } };     /** * A reusable canvas context. * @type {CanvasRenderingContext2D} * @private */ ol.source.Raster.context_ = null;     /** * Get a list of layer states from a list of renderers. * @param {Array.<ol.renderer.canvas.Layer>} renderers Layer renderers. * @return {Array.<ol.layer.LayerState>} The layer states. * @private */ ol.source.Raster.getLayerStatesArray_ = function(renderers) { return renderers.map(function(renderer) { return renderer.getLayer().getLayerState(); }); };     /** * Create renderers for all sources. * @param {Array.<ol.source.Source>} sources The sources. * @return {Array.<ol.renderer.canvas.Layer>} Array of layer renderers. * @private */ ol.source.Raster.createRenderers_ = function(sources) { var len = sources.length; var renderers = new Array(len); for (var i = 0; i < len; ++i) { renderers[i] = ol.source.Raster.createRenderer_(sources[i]); } return renderers; };     /** * Create a renderer for the provided source. * @param {ol.source.Source} source The source. * @return {ol.renderer.canvas.Layer} The renderer. * @private */ ol.source.Raster.createRenderer_ = function(source) { var renderer = null; if (source instanceof ol.source.Tile) { renderer = ol.source.Raster.createTileRenderer_(source); } else Eif (source instanceof ol.source.Image) { renderer = ol.source.Raster.createImageRenderer_(source); } else { goog.asserts.fail('Unsupported source type: ' + source); } return renderer; };     /** * Create an image renderer for the provided source. * @param {ol.source.Image} source The source. * @return {ol.renderer.canvas.Layer} The renderer. * @private */ ol.source.Raster.createImageRenderer_ = function(source) { var layer = new ol.layer.Image({source: source}); return new ol.renderer.canvas.ImageLayer(layer); };     /** * Create a tile renderer for the provided source. * @param {ol.source.Tile} source The source. * @return {ol.renderer.canvas.Layer} The renderer. * @private */ ol.source.Raster.createTileRenderer_ = function(source) { var layer = new ol.layer.Tile({source: source}); return new ol.renderer.canvas.TileLayer(layer); };     /** * @typedef {{revision: number, * resolution: number, * extent: ol.Extent}} */ ol.source.Raster.RenderedState;       /** * @classdesc * Events emitted by {@link ol.source.Raster} instances are instances of this * type. * * @constructor * @extends {goog.events.Event} * @implements {oli.source.RasterEvent} * @param {string} type Type. * @param {olx.FrameState} frameState The frame state. * @param {Object} data An object made available to operations. */ ol.s